GCC for Windows 64 & 32 bits


Mingw-w64 is an advancement of the original mingw.org project, created to support the GCC compiler on Windows systems. It has forked it in 2007 in order to provide support for 64 bits and new APIs. It has since then gained widespread use and distribution.

The development and community are very active and welcoming with new contributors every month and simple installers.

Version 8 has been released

v8.0.0: 2020-09-18

Notable changes:

  • New Hyper-V headers and libraries by Biswapriyo Nath
  • Many headers updated from Wine by Jacek Caban.
  • ARM math improvements by Martin Storsjö
  • floating point fixes by Liu Hao
  • many *printf compatibility fixes by Liu Hao and Martin Storsjö
  • massive Windows App Store API updates by Steve Lhomme
  • winstorecompat library updates by Martin Storsjö
  • __USE_MINGW_ANSI_STDIO now automatically enabled in C99 and C11 mode when not using UCRT by Pali Rohár
  • wdm and ddk updates by Zebediah Figura
  • UCRT for Windows Store Apps (-lucrtapp) by Martin Storsjö
  • Audioclient and ActivateAudioInterfaceAsync API updates by Liu Hao
  • DirectX SDKs are now always installed
And many other additions thanks to, but not limited to (in Alphabetical order)

You can also look at the full list of versions.

Headers, Libraries and Runtime

  • More than a million lines of headers are provided, not counting generated ones, and regularly expanded to track new Windows APIs.
  • Everything needed for linking and running your code on Windows.
  • Winpthreads, a pthreads library for C++11 threading support and simple integration with existing project.
  • Winstorecompat, a work-in-progress convenience library that eases conformance with the Windows Store.
  • Better-conforming and faster math support compared to Visual Studio's.


  • gendef: generate Visual Studio .def files from .dll files.
  • genidl: generate .idl files from .dll files.
  • widl: compile .idl files.

Friend projects

Mingw-w64 interacts a lot with other projects in order to help everyone move forward. Contributions have been going to and coming from these projects:

Most Recent Activity

Jose Fonseca posted a comment on ticket #892

https://github.com/Microsoft/DirectXTK/wiki/ComPtr#constructing-assigning-and-copying-comptr also makes this explicit. It says: If you want to give a raw pointer to a ComPtr without changing the reference count, you need to use Attach.

Jose Fonseca created ticket #892

Microsoft::WRL::ComPtr::Attach leaks references

Ozkan Sezer committed [f1c6e1]

Updated imported headers to current Wine version.

Ozkan Sezer committed [200e01]

dwmapi.def: Regenegerate from Windows 10

Ozkan Sezer committed [a911a4]

Implement IAMAsyncReaderTimestampScaling and IAMPluginControl using IDL.

Martin Storsjö committed [1c7738]

headers: Hide _IO* flags in UCRT mode.

LH_Mouse committed [75d2db]

include/crt: Use GCC predefined macros instead of MSVC-ish ones

LH_Mouse committed [20d87c]

include/stralign: Canonicalize macros for x86-64

lazka created ticket #891

[UCRT"> Issues with HUGE and _HUGE macros

LH_Mouse committed [c6e13e]

include/float: Only hide non-reserved identifiers in strict conformance mode